a. [f. EPITHELI-UM + -AL 1.] Of or pertaining to the epithelium; of the nature of epithelium: a. in animals; b. in plants.

1

  a.  1845.  Todd & Bowman, Phys. Anat., I. 90. A pavement of nucleated epithelial particles.

2

1859.  Carpenter, Anim. Phys., i. (1872), 42. The epithelial layer of the mucous membranes.

3

1872.  Huxley, Physiol., ii. 36. There is, however, an internal membranous and epithelial lining, called the endocardium.

4

  b.  1862.  H. Macmillan, in Macm. Mag., Oct., 464. Numerous epithelial scales may be observed.

5

1884.  Bower & Scott, De Bary’s Phaner. & Ferns, 447. A special layer, often consisting of numerous small epithelial cells.

6